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Most applications of rank() will be to one variable, but the argument exp can be more general,
namely, an expression. In particular, rank(-varname) reverses ranks from those obtained by
rank(varname).
The default ranking and those obtained by using one of the track, field, and unique options
differ principally in their treatment of ties. The default is to assign the same rank to tied values
such that the sum of the ranks is preserved. The track option assigns the same rank but resembles
the convention in track events; thus, if one person had the lowest time and three persons tied for
second-lowest time, their ranks would be 1, 2, 2, and 2, and the next person(s) would have rank 5.
The field option acts similarly except that the highest is assigned rank 1, as in field events in which
the greatest distance or height wins. The unique option breaks ties arbitrarily: its most obvious use
is assigning ranks for a graph of ordered values. See also group() for another kind of “ranking”.

The principles of Bayesian analysis date back to the work of Thomas Bayes, who was a Presbyterian
minister in Tunbridge Wells and Pierre Laplace, a French mathematician, astronomer, and physicist in
the 18th century. Bayesian analysis started as a simple intuitive rule, named after Bayes, for updating
beliefs on account of some evidence. For the next 200 years, however, Bayes’s rule was an
obscure idea. Along with the rapid development of the standard or frequentist statistics in 20th century,
Bayesian methodology was also developing, although with less attention and at a slower pace. One
of the obstacles for the progress of Bayesian ideas has been the lasting opinion among mainstream
statisticians of it being subjective. Another more-tangible problem for adopting Bayesian models in
practice has been the lack of adequate computational resources. Nowadays, Bayesian statistics is
widely accepted by researchers and practitioners as a valuable and feasible alternative.
Bayesian analysis proliferates in diverse areas including industry and government, but its application
in sciences and engineering is particularly visible. Bayesian statistical inference is used in econometrics
(Poirier [1995]; Chernozhukov and Hong [2003]; Kim, Shephard, and Chib [1998], Zellner [1997]);
education (Johnson 1997); epidemiology (Greenland 1998); engineering (Godsill and Rayner 1998);
genetics (Iversen, Parmigiani, and Berry 1999); social sciences (Pollard 1986); hydrology (Parent
et al. 1998); quality management (Rios Insua 1990); atmospheric sciences (Berliner et al. 1999); and
law (DeGroot, Fienberg, and Kadane 1986), to name a few.

2019年12月下旬,Stata正式推出中文版本。如果您的电脑语言是中文,那么Stata会自动识别为中文版。Windows和Unix系统可手动更改语言版本,Edit > Preferences > User-interface language,如果是Mac系统,可通过Stata 15 > Preferences > User-interface language手动更改版本语言。
Stata是一款完整的、集成的统计软件包,提供您需要的一切数据分析、数据管理和图形。
快速,简单并易于使用
点击式的界面和强大,直观的命令语言让Stata使用起来快速,并易于使用。
所有的分析结果都可以被复制和存档,并用来出版和审查。不管您什么时候写的内容,版本控制系统确保统计程序可继续生成同样的结果。
统计功能介绍
Stata使得大量的统计工具用于指尖
标准方法,如
基本表格和总结
案例对照分析
ARIMA
ANOVA 和MANOVA
线性回归
时间序列平滑
广义线性模型(GLM)
聚类分析
对比和比较
功率分析
样本选择
……
方法,如
多层模型
生存分析
动态面板数据回归
结构方程建模
二进制,计数和审查结果
ARCH
多重替代法
调查数据
Treatment effects
统计
贝叶斯分析
……
科学软件网是一个以引进国外科研软件,提供软件服务的营业,由天演融智软件有限公司创办,旨在为国内高校、科研院所和以研发为主的企业事业单位提供的科研软件及相关软件服务。截止目前,科学软件网已获得数百家国际软件公司正式授权,代理销售科研软件达一千余种,软件涵盖领域包括经管,仿真,地球地理,生物化学,工程科学,排版及网络管理等。同时,还提供培训、视频课程(包含34款软件,64门课程)、实验室解决方案和项目咨询等服务。
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